Y r the distances to the planets given in km? I've already answered the 2nd part to this question, and this is the fist part.
I think that the distances to the planets are given in kilometres because all the planets aren't that far away from eachother that they need to be measured in light years.
Please correct me if I'm wrong, thanks
2 answers
Sara: it takes light 8 min to reach the Earth from the Sun. How far would the light travel in one year? So you are right, but a light year is far, far greater than the planets orbitals.
http://www.jiskha.com/display.cgi?id=1266894455